I had to make a bunch of C++ files, and couldn't be bothered to make all the cpp/hpp pairs, so instead I wrote a script that does it for me! It also makes sure not to overwrite any files that already exist

touch-cpp.sh

function touch-cpp {
    for file in "$@"
    do
        cpp="$file.cpp"
        hpp="$file.hpp"
        
        # only actually attempt to write the files if they don't exist.
        if [ -f $cpp -o -f $hpp ]
        then
            echo ">> Either $cpp or $hpp already exist, no action taken."
        else
            touch $cpp
            echo "// The implementation file of $file" > $cpp
            echo "#include \"$hpp\"" >> $cpp
            
            touch $hpp
            echo "// The header file of $file" > $hpp
            echo "#ifndef ${file}_hpp" >> $hpp
            echo "#define ${file}_hpp" >> $hpp
            echo "// code goes here"   >> $hpp
            echo "#endif"              >> $hpp

            echo ">> Files $cpp and $hpp written to $(pwd)."
        fi
    done
    unset cpp
    unset hpp
}